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Radio Source Surveys: Mergers at High Redshifts?

Published online by Cambridge University Press:  25 May 2016

Patrick J. McCarthy*
Carnegie Observatory, 813 Santa Barbara St, Pasadena, CA 91101


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The early study of radio sources at visible wavelengths and the first empirical evidence that galaxies can have strong dynamical interactions are closely intertwined. Baade & Minkowski's (1954) model of Cygnus A as a pair of galaxies in collision, while now believed to be incorrect, presaged the merger-driven picture for the generation of radio sources (e.g. Heckman et al. 1986) by some 30 years. Morphological evidence for an association between mergers and radio loud AGN is seen in both the nearest radio galaxies (e.g. Cen A; Schweizer 1986) and in the most powerful sources at z ~ 0.1 - 0.3 (Stockton & Mackenty 1983; Hutchings et al. 1988; Heckman et al. 1986).

Nuclear Activity
Copyright © Kluwer 1999 


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